HPD Innovations – ARX-02a Chassis

Background

The Acura ARX-02a was a Le Mans Prototype constructed and raced by Acura, and introduced in 2009 for competition in the LMP1 category of the American Le Mans Series.

Purpose

HPD and its technical partner, Wirth Research, developed an all-new LMP1 chassis to compete against the diesel cars from Audi and Peugeot. In an attempt to overcome the power deficit to these diesels (which were favored by the ACO rules), the aim was to generate as much mechanical grip as possible. The ARX-02a was the first car to have the rear tires fitted onto the front, thereby increasing the contact patch by seven percent. This required a weight bias much further forward than a car equipped with conventional tires; this forward bias was helped by the engine's lower mass when compared to a larger diesel engine. The car also featured highly advanced aerodynamics, developed primarily in CFD (as opposed to more conventional scale-model wind-tunnel testing)

Latest

The ARX-02a was campaigned by two teams: de Ferran Motorsport (drivers Gil de Ferran, Simon Pagenaud and Scott Dixon) and Highcroft Racing (drivers David Brabham, Scott Sharp and Dario Franchitti), and made its competition debut at the 2009 12 Hours of Sebring. Scott Dixon put the de Ferran entry on pole position at Sebring ahead of the diesels of Audi and Peugeot. The ARX-02a went on to score eight wins that year; as Highcroft Racing clinched the ALMS championship ahead of de Ferran Motorsport. Despite its success, the 2009 season was the last for this innovative chassis.

Product Specs

Chassis
Tires:
 
Michelin

Brakes:
 
AP Racing 6 piston Calipers / Brembo discs, 380mm diameter

Chassis:
 
Carbon fiber monocoque

Weight:
 
900kg

Height:
 
1030mm

Width:
 
2000mm

Suspension:
 
Double wishbone, pushrod actuated, torsion bar front and rear. Multi-way adjustable dampers. Front and rear anti-roll bar

Transmission:
 
6-speed, Xtrac internals with bespoke casing; HPD-controlled paddle shift

Fuel:
 
E10 race fuel

Fuel Capacity:
 
90 liters

 
HPD

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